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Fofino [41]
3 years ago
11

The jib crane is supported by a pin at Cand rod AB. The rod can withstand a maximum tension of 40 kN. If the load has a mass of

2000 kg, with its center of mass located at G. Determine its maximum allowable distance x and the corresponding horizontal and vertical components of reaction at C.
Engineering
1 answer:
lakkis [162]3 years ago
6 0

Answer:

The maximum allowable distance = 5 m

Explanation:

Data:

There will be three forces on the jib. Let the forces be denoted as:

C_{x}, C_{y} and the force on pole AB

To find the angle AB makes with the horizontal beam:

tan^{-1}(\frac{3}{4}) = 36.8699

The load has a mass of 2 000 kg then, the force will be:

F = mg, where g = 9.81 m/s²

  = 2000* 9.81 = 19 620 N

Breaking AB into its x and y coordinates:

AB_{x}=ABcos(36.8699)\\AB_{y} = ABsin(36.8699)

Then,

∑M_{c} = 0

0 = (4)(AB sin (36.8699) + 0.2 (AB cos (36.8699) - (5*19620)\\AB = 38 320. 3 N

∑F_{x} = 0\\C_{x} = AB cos(36.8699)\\C_{x} = 30 656.2 N

∑F_{y} = 0\\C_{y} + AB sin (36.8699) - 19 620 = 0\\C_{y} = - 3 372.18 N

so the components of the forces will be 30 656.2 N and - 3 372.18 N

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Answer:

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